I love this vest. I have the heavier weight vest that I wear in the dead of winter and it's still usually too hot. This vest is perfect for fall, winter and spring. I've worn heavy layers with it and short sleeve shirts. It seems to work great every time and blocks the wind well. I am 5'1" 110 and usually wear XS to S. I bought small so I'd have coverage on my backside and room to layer. I could have gone XS for a more flattering look but I think the small fits fine and it more practical.

I love this vest, and wear it almost daily. My one complaint is that it's a little tight in the midriff. I normally have plenty of space in a size small, but this vest feels a little constricting, to the point that it changes my mechanics. It's a beneficial sensation on the run, because the compression keeps me mindful of my posture. Wearing the vest all day has proven slightly uncomfortable, though.

This is the first time i use a vest like this for running, and can definitely say i have a good first experience. The vest is very light, you hardly notice it. The fit is loos, (i'm 5'3/110 got the Small, which is usually my size in Brooks), and i wouldn't want it any tighter than it is. I could probably get the XS, but i think for running comfort the Small is better.The only thing i wasn't too happy with, is that i don't think it's really sweat wicking. it was kinda wet after a run, and i don't sweat THAT much...but other than that i'm happy with it.

I love this running vest! It is such a great transitional piece for spring when you still need the wind-breaking ability of a jacket but you don't necessarily need the warmth of a full jacket. It's a great layering piece that will provide a little protection from spring's brisk winds. I usually wear it with one long-sleeve layer underneath, but could see myself wearing it with other combinations too. The color choices are all so chic that I had a hard time choosing just one- I went with the purple/pink. Conveniently, this vest also rolls up into the back pocket.

It is very lightweight, so I wouldn't recommend it for sub-20 degree weather! Here in Minnesota I reserve it for the "nice" days.

Disclosure: This review was written by a Brooks-sponsored elite athlete.